Spring boot 集成EsayPOI实现导入导出功能

1.导入jar包：

    
        cn.afterturn
        easypoi-base
        3.0.3
    
    
        cn.afterturn
        easypoi-web
        3.0.3 
    
        cn.afterturn
        easypoi-annotation
        3.0.3
    
    
    
        commons-fileupload
        commons-fileupload
        1.3.1
    

2.导入工具类：

public class ExcelUtiles {
    public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass,
                                   String fileName, boolean isCreateHeader, HttpServletResponse response){
        ExportParams exportParams = new ExportParams(title, sheetName);
        exportParams.setCreateHeadRows(isCreateHeader);
        defaultExport(list, pojoClass, fileName, response, exportParams);
    }
 
    public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass,String fileName,
                                   HttpServletResponse response){
        defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));
    }
 
    public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response){
        defaultExport(list, fileName, response);
    }
 
    private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName,
                                      HttpServletResponse response, ExportParams exportParams) {
        Workbook workbook = ExcelExportUtil.exportExcel(exportParams,pojoClass,list);
        if (workbook != null); downLoadExcel(fileName, response, workbook);
    }
 
    private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {
        try {
            response.setCharacterEncoding("UTF-8");
            response.setHeader("content-Type", "application/vnd.ms-excel");
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
            workbook.write(response.getOutputStream());
        } catch (IOException e) {
            //throw new NormalException(e.getMessage());
        }
    }
 
    private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {
        Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
        if (workbook != null);
        downLoadExcel(fileName, response, workbook);
    }
 
    public static <T> List<T> importExcel(String filePath,Integer titleRows,Integer headerRows, Class<T> pojoClass){
        if (StringUtils.isBlank(filePath)){
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        List<T> list = null;
        try {
            list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
        }catch (NoSuchElementException e){
            //throw new NormalException("模板不能为空");
        } catch (Exception e) {
            e.printStackTrace();
            //throw new NormalException(e.getMessage());
        } return list;
    }
 
        public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class<T> pojoClass){
        if (file == null){ return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        List<T> list = null;
        try {
            list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
        }catch (NoSuchElementException e){
           // throw new NormalException("excel文件不能为空");
        } catch (Exception e) {
            //throw new NormalException(e.getMessage());
            System.out.println(e.getMessage());
        }
        return list;
    }
 }

3.编写实体映射类:

@Entity
@Table(name = "seckill")
public class DemoExcel {
 
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Excel(name = "id" ,orderNum = "0")
    private Long seckillId;
 
    @Column(name = "name")
    @Excel(name = "姓名" ,orderNum = "1")
    private String name;
 
    @Column(name = "number")
    @Excel(name = "数量" ,orderNum = "2")
    private int number;
 
    @Column(name = "start_time")
    @Excel(name = "开始日期" ,orderNum = "3",importFormat = "yyyy-MM-dd HH:mm:ss")//exportFormat = "yyyy-MM-dd HH:mm:ss")
    private Date startTime;
 
    @Column(name = "end_time")
    @Excel(name = "结束日期" ,orderNum = "4",importFormat = "yyyy-MM-dd HH:mm:ss")//exportFormat = "yyyy-MM-dd HH:mm:ss")
    private Date endTime;
 
    @Column(name = "create_time")
    @Excel(name = "创建日期" ,orderNum = "5",importFormat = "yyyy-MM-dd HH:mm:ss")//exportFormat = "yyyy-MM-dd HH:mm:ss")
    private Date createTime;

4.控制层代码：

@RestController
@RequestMapping("/Excel")
public class ExcelController {
 
    @Autowired
    private DemoExcelRepository demoExcelRepository;
 
    @Autowired
    private DemoService demoService;
 
    @GetMapping("/export")
    public void export(HttpServletResponse response) {
        System.out.println(1);
//        模拟从数据库获取需要导出的数据
        List<DemoExcel> personList = demoExcelRepository.findAll();
//         导出操作
        ExcelUtiles.exportExcel(personList, "测试名", "什么名字", DemoExcel.class, "测试.xls", response);
    }
 
    @PostMapping("/importExcel2")
    public void importExcel2(@RequestParam("file") MultipartFile file) {
        ImportParams importParams = new ImportParams();
        // 数据处理
        importParams.setHeadRows(1);
        importParams.setTitleRows(1);
 
        // 需要验证
        importParams.setNeedVerfiy(true);
 
        try {
            ExcelImportResult<DemoExcel> result = ExcelImportUtil.importExcelMore(file.getInputStream(), DemoExcel.class,importParams);
            List<DemoExcel> successList = result.getList();
            for (DemoExcel demoExcel : successList) {
              System.out.println(demoExcel);
            }
        } catch (IOException e) {
        } catch (Exception e) {
        }
    }
}

原文链接：https://blog.csdn.net/qq_37598011/article/details/80918565